baldwin chapman



@gleiten tetes @what @Hire Latent-mnt No. 75,521, mamma 1v, 186s. i

IMPRovsD GAR-WHEEL.

-iilge ttrtnlr afirma tu irtlgirtttms @atentan making satt at tigt rama'To ALL WHoM 1T MAYGONCERN:

Be it known vthat I, S. BALDwIN CHAPMAN, of the city, county,-andStategof New York, have invented a.

' new and improved Car-Wheel and I do hereby declare'thatthefollowing isaffull, clear, and exact description lthereof, which will enable'othersskilled in the artto make a'nd use the same, reference being hadto the accompartying drawings, formingpart of, this specification.'

This invention relatesl to a new and improved wheel for railway-cars,andit consists in a novel and improved manner of constructing the wheel,as hereinafterv fully shown and described,` whereby several .advantagesare obtained over the ordinary cast-ironwheel, to wit: first, theavoidance of breakage and the consequent accidents arising therefrom,an'entire cast-iron wheel being very liable to-crack; second, adiminution of the wear and tear'of the rails and vrolling-stock, thelatter4 -not being subjected to the jars and concussione which 'theyreceive when on the ordinary cast-iron wheels; third, greaterVdurability and economy, the length of time'my improvement will last orrun, rendering them far less expensive than the onesnow in use. Intheaccompanying drawingsl l Figure 1 is a side sectional view of myinvention, taken in the line :c x, g., 2.

` f Figure 2, a.V vertical section of the same, taken in the line yg,fig. 1.

Similar let-ters of reference indicate corresponding parts.

My improved wheel is constructedof iron and wood, with an elasticmaterial for` the inner ends of the wood portions to rest or bear upon.A

A represents a cast-iron circular plate, provided with a iange, a, atone side near its periphery,and cast with a hub, B, which projectshorizontally from the sidey opposite toV that which is provided with theange a,

. (see tig. 2.) C representspsections of wood, which are of taper form,the sides being radial with the wheel, (see iig. 1,) and the grain ofthe wood also being radial with the wheel, sothat the exterior surfacesof the'sections C, which form the tread of the wheel, will be endwise ofthe grain. This insures'great `durability. The sections shouldhe'constructed of some hard, durable wood, such, for instance, ashickory or oak, and-.adjusted snugly to the wheel, their inner endsresting against an elastic ring, AX, of India rubber or other suitableelastic substance, which is fitted on the hub B, the thickness of thesections being equal tothe length of the hub B, as shown in fig. 2.'.lhe sections have an annular concentric groove in eachside of them, toreceive metal rings D D, and abolt, 1),' passes through each section C,and through thc plate A, and a plate, E, which muy be of wrought orcast'iron, and ttedaganst the sides of-the sections opposite tothe'sides against which the plate A is fitted. By screwing up the boltsb, the sections areirmlyclamped between the two platcsA E. Besides thesebolts b, the plate E isl secured by others, c, which pass into the endof the hub B. The edge or periphery of, the plate E is flush with theexterior of thc wooden sections C, but the plate A is sufficiently greatin diameter to project beyond the exterior surface of the wood sectionsto form the ange of the wheel.

Thewheel thus constructed is very strong and durable, and may be made ata reasonable cost, and will run without transmitting jars orconcussions-to thecars, the wood sections C, in connection with theelastic ring AX, insuring this result; the holes in the sections C,through which the bolts b pass, being made suiiciently large to admit ofthe yielding or giving of the sections to a necessary degree.

Having described my invention, I claim as new, and desire to secure byLetters Patent- A wheel for railway-cars, composed of the metal plates AE,wooden sections C, and the elastic ring AX,

` all being securedytogether by bolts, 'and used withor without rings DD, substantially as herein shown and described.

S. BALDWIN CHAPMAN.

Witnesses:`

WM. DEAN OVERELL, J. A. SERVICE.

